Toriko Vol. 23 (manga)

When the Four-Beasts is revealed to be a single giant monster that craves human flesh, Toriko and the Four Kings rush to the center of the Human World to stop it from eating the helpless populace. But as soon as they get there, it unleashes a toxic rain. While Komatsu cooks up a life-saving cure, the Four Kings pool their appetite for the ultimate combination attack!